Cydia

GeoHotz, famous for unlocking the first iPhone, has posted his instructions on hardware unlocking the 1.1.2 OTB iPhone on his blog. If you have a 1.1.2 OTB and have been waiting, wait just a few more days - hardware unlock is all well and good, but the dev team will have a new version of AnySIM working with OTB 1.1.2 iPhones very soon now that GeoHotz has sorted the hardware unlock.

Since the 1.1.3 firmware does come with a new boot loader as well, we may be waiting til 1.1.4 for an unlock to happen for 1.1.3 OTB. Jailbreak will be sooner, though.